Iowa renewal guide
Hydronic Systems Contractor License
If this license is up for renewal, this page gives you the fee, the timeline, and the items that usually hold the filing up.
Start here
What matters before you file.
Check the fee, the renewal window, and the documents or insurance records that can slow approval down.
Issuing authority
Renewal period
Every 36 months
Renewal fee
$380.00
Bond requirement
Yes — $5,000.00
Insurance requirement
Yes — General Liability, Workers' Compensation
Continuing education
8 hours
Before you renew
Get the filing straight.
- 1
Finish the CE first
Complete the 8 required hours before you start the renewal.
- 2
Make sure the bond still clears
The $5,000.00 bond requirement needs to stay active through the renewal.
- 3
Check the insurance certificates
Make sure the required policies are current and match what the board or agency expects before you file.
- 4
File with the board
File through Iowa Plumbing and Mechanical Systems Board (PMSB) and pay the $380.00 renewal fee once the supporting proof is ready.
Renew online - 5
Leave room for processing
Typical processing time is 42 days, so do not wait until the last minute.
Detailed notes
The fine print is here.
Iowa Hydronic Systems Contractor License
The Iowa Plumbing and Mechanical Systems Board (PMSB) issues the Hydronic Systems Contractor license to businesses that provide hydronic heating and cooling system services on a contractual basis. The hydronic discipline covers radiant floor heating, baseboard hot water systems, chilled water systems, and related hydronic piping.
What This License Authorizes
A Hydronic Systems Contractor license authorizes the holder to contract for and perform installation, alteration, and repair of hydronic heating and cooling systems throughout Iowa. The contractor must have a master of record with an active Master Hydronic Systems license.
Bond and Insurance Requirements
- Surety Bond: $5,000 minimum performance bond required, filed with the PMSB
- General Liability Insurance: Minimum $500,000 coverage from an Iowa-licensed insurer
- Workers' Compensation: Required if the contractor has employees
Application Process
The combined contractor license and registration fee is $380 for a full three-year term. Paper applications incur an additional $25 processing fee. Applicants must demonstrate they hold or employ someone with an active Master Hydronic Systems license and provide proof of insurance and bonding. Allow four to six weeks for processing.
Renewal Process
- Renewal Period: Every 3 years (next expiration: June 30, 2029)
- Renewal Fee: $380 (combined license and registration)
- Continuing Education: 8 hours of classroom instruction required per three-year licensing term
- Grace Period: Approximately 30 days after expiration to renew without additional penalties
Consequences of Operating Without a License
Operating as an unlicensed hydronic systems contractor violates Iowa Code Chapter 105. The PMSB may issue cease-and-desist orders, impose administrative penalties, and initiate license revocation proceedings against violators.
*Disclaimer: This information is provided for general reference only and does not constitute legal advice. Always verify current requirements directly with the Iowa Plumbing and Mechanical Systems Board.*
Official links
Check the board or agency directly.
Required documents
- Proof of Insurance
- Bond Certificate
- master_hydronic_employment_verification
- unemployment_insurance_number
Source notes
Iowa Plumbing and Mechanical Systems Board . Verified March 2026. https://dial.iowa.gov/licenses/building/plumbing-mechanical/plumbing-licensure/contractor-license
Rules move. Check Iowa Plumbing and Mechanical Systems Board (PMSB) again before you pay, renew, or schedule work around this requirement.
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Next steps
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Iowa checklist
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